Git commits in Moodle 2.9.1 by Aaron Barnes

commit 7ee737690a64b695edb42b0486b9362586104cbb
Author: Aaron Barnes <aaronb@catalyst.net.nz>
Date:   Tue, 19 May 2015 18:41:19 +0800
Tag:    v2.9.1

MDL-49611 completion: Update dangling err_nocriteria lang strings